E.7 Flushing anomalous network links advertisements

E.7 Flushing anomalous network links advertisements

Text was added indicating that a network links advertisement
whose Link State ID is equal to one of the router's own IP
interface addresses should be considered to be self-originated,
regardless of the setting of the advertisement's Advertising
Router. If the Advertising Router of such an advertisement is
not equal to the router's own Router ID, the advertisement
should be flushed from the routing domain using the premature
aging procedure specified in Section 14.1. This case should be
rare, and it indicates that the router's Router ID has changed
since originating the advertisement.

Failure to flush these anomalous advertisements could lead to
multiple network links advertisements having the same Link State
ID. This in turn could cause the Dijkstra calculation in Section
16.1 to fail, since it would be impossible to tell which network
links advertisement is valid (i.e., more recent).